Now the tough question arises who will manage this MongoDB setup on Kubernetes considering its monitoring, security, and best practices of it. But you guys don’t have to worry, we do as well have an answer and the answer is MongoDB Operator by Opstree Solutions.<\/p>\n\n\n
![\"\"](\"https:\/\/opstree.com\/blog\/\/wp-content\/uploads\/2022\/05\/image-3.png?w=136\")
MongoDB Operator<\/h2>\n\n\n\n
The MongoDB operator is a custom CRD-based operator inside Kubernetes to create, manage, and auto-heal MongoDB setup. It helps in providing different types of MongoDB setup on Kubernetes like- standalone, replicated, and sharded.<\/em><\/strong> There are quite amazing features we have introduced inside the operator and some are in-pipeline on which deployment is going on. Some of the MongoDB operator features are:-<\/p>\n\n\n\n Other than this, there are a lot of features are in the backlog on which active development is happening. For example:-<\/p>\n\n\n\n MongoDB Operator architecture looks like this:-<\/p>\n\n\n\n For more information about MongoDB Operator, please check out the documentation page of it. MongoDB Operator requires a Kubernetes cluster of version >=1.16.0. If you have just started with the CRD and Operators, it’s highly recommended to use the latest version of Kubernetes.<\/p>\n\n\n\n Setup of MongoDB operator can be easily done by using simple helm<\/a> and kubectl<\/a> commands.<\/p>\n\n\n\n First, add the helm repository to your system.<\/p>\n\n\n\n Once the helm repository is configured, we can simply deploy the operator using the helm install<\/em><\/strong> command. After the operator deployment is successful, we can verify it using the kubectl<\/strong> command line.<\/p>\n\n\n\n MongoDB cluster can be easily set up on Kubernetes cluster by providing a simple manifest file like this:-<\/p>\n\n\n\n Once the manifest is ready we can simply apply it using kubectl<\/strong>.<\/p>\n\n\n\n After the setup is done, we can easily verify the MongoDB setup using mongo-cli<\/strong>.<\/p>\n\n\n\n This example is more of a POC kind of setup, there are multiple examples available inside the examples<\/a> directory. Also, if you want to set up a cluster using the helm chart<\/strong>, we can simply do it using the helm install <\/strong>commands as well.<\/p>\n\n\n\n This operator is still under development, and we are working towards adding some valuable features inside it. Since it’s an open-source project, so if you guys want to make a contribution please feel free to do it. The contribution to the project can be done by opening feature requests, bugs, and Pull Requests.<\/p>\n\n\n\n For more information, please refer to the repository link.<\/p>\n\n\n\n https:\/\/github.com\/OT-CONTAINER-KIT\/mongodb-operator<\/a><\/p>\n\n\n\n Thanks for reading, I\u2019d really appreciate any and all feedback, please leave your comment below if you guys have any feedback.<\/p>\n\n\n\n Cheers till next time!!<\/p>\n\n\n\n Opstree<\/a><\/strong> <\/a>is an End to End DevOps solution provider<\/p>\n\n\n\n![\"\"](\"https:\/\/opstree.com\/blog\/\/wp-content\/uploads\/2022\/05\/image-4.png?w=1024\")
https:\/\/ot-mongodb-operator.netlify.app\/<\/a>
https:\/\/github.com\/OT-CONTAINER-KIT\/mongodb-operator<\/a><\/p>\n\n\n\nInstallation and Configuration of MongoDB Operator<\/h2>\n\n\n\n
# Add the helm chart\n$ helm repo add ot-helm \\ \nhttps://ot-container-kit.github.io\/helm-charts\/\n...\n\"ot-helm\" has been added to your repositories<\/pre>\n\n\n\n
<\/p>\n\n\n\n# Deploy the MongoDB Operator\n$ helm install mongodb-operator \\\not-helm\/mongodb-operator --namespace ot-operators\n...\nRelease \"mongodb-operator\" does not exist. Installing it now.\nNAME: mongodb-operator\nLAST DEPLOYED: Sun Jan 9 23:05:13 2022\nNAMESPACE: ot-operators\nSTATUS: deployed\nREVISION: 1<\/pre>\n\n\n\n
# List the pod and status of mongodb-operator\n$ kubectl get pods -n ot-operators -l name=mongodb-operator\n...\nNAME READY STATUS RESTARTS AGE\nmongodb-operator-fc88b45b5-8rmtj 1\/1 Running 0 21d<\/pre>\n\n\n\n
MongoDB Cluster setup on Kubernetes<\/h2>\n\n\n\n
---\napiVersion: opstreelabs.in\/v1alpha1\nkind: MongoDBCluster\nmetadata:\n name: mongodb\nspec:\n clusterSize: 3\n kubernetesConfig:\n image: quay.io\/opstree\/mongo:v5.0\n imagePullPolicy: IfNotPresent\n securityContext:\n fsGroup: 1001\n storage:\n accessModes: [\"ReadWriteOnce\"]\n storageSize: 1Gi\n storageClass: csi-cephfs-sc\n mongoDBSecurity:\n mongoDBAdminUser: admin\n secretRef:\n name: mongodb-secret\n key: password\n mongoDBMonitoring:\n enableExporter: true\n image: bitnami\/mongodb-exporter:0.11.2-debian-10-r382\n imagePullPolicy: IfNotPresent<\/pre>\n\n\n\n
$ kubectl apply -f clusterd.yaml\n\n$ kubectl get pods --namespace ot-operators -l app=mongodb-cluster\n...\nNAME READY STATUS RESTARTS AGE\nmongodb-ex-cluster-cluster-0 2\/2 Running 0 5m57s\nmongodb-ex-cluster-cluster-1 2\/2 Running 0 5m28s\nmongodb-ex-cluster-cluster-2 2\/2 Running 0 4m48s<\/pre>\n\n\n\n
# Verifying the health of the cluster\n$ kubectl exec -it mongodb-ex-cluster-cluster-0 -n ot-operators -- bash\n\n$ mongo -u $MONGO_ROOT_USERNAME -p $MONGO_ROOT_PASSWORD --eval \"db.adminCommand( { replSetGetStatus: 1 } )\"\n...\n{\n\t\"set\" : \"mongodb-ex-cluster\",\n\t\"date\" : ISODate(\"2022-02-03T08:52:09.257Z\"),\n\t\"myState\" : 1,\n\t\"term\" : NumberLong(1),<\/pre>\n\n\n\n# Installation of MongoDB replication cluster\n$ helm install mongodb-ex-cluster --namespace ot-operators ot-helm\/mongodb-cluster\n...\nNAME: mongodb-ex-cluster\nLAST DEPLOYED: Tue Feb 1 23:18:36 2022\nNAMESPACE: ot-operators\nSTATUS: deployed\nREVISION: 1\nTEST SUITE: None\nNOTES:\n CHART NAME: mongodb-cluster\n CHART VERSION: 0.1.0\n APP VERSION: 0.1.0\n\nThe helm chart for MongoDB standalone setup has been deployed.\n\nGet the list of pods by executing:\n kubectl get pods --namespace ot-operators -l app=mongodb-ex-cluster-cluster\n\nFor getting the credential for admin user:\n kubectl get secrets -n ot-operators mongodb-ex-secret -o jsonpath=\"{.data.password}\" | base64 -d<\/pre>\n\n\n\nConclusion<\/h2>\n\n\n\n
Blog Pundit:<\/strong> Sandeep Rawat<\/strong><\/a><\/p>\n\n\n\n